Brush-holder support.



G. T. CROGKER.

BRUSH HOLDER SUPPORT.

' APPLICATION FILED mum, 1905.

996,218, Patented June 27, 1911.

Hy. Z

Fig.3

[n vein for Clarence T CZ'OtKer Attorney UNITE s CLARENCE T.

CROCKER, OF NORWOOD, 01110, ASSIGNOR TO THE BULLOCK ELECTRIC MANUFACTURING COMPANY, A CORPORATION OF OHIO.

BRUSH-HOIJDER SUPPORT.

Specification of Letters Patent. Patented June 27, 1911 Application filed. June 5, 1905.

Serial No. 263,839.

To all whom it may concern:

Be it known that I, CLARENCE T. CROCKER, citizen of the United States, residing at Norwood, in the county of Hamilton and State of Ohio, have invented certain new and useful IITIPIOVGHlQlliS in Brush-Holder Supports, of which the following is a full, clear, and exact specification.

My present invention relates to supports for brush holders especially adapted for use in connection with railway motors and similar electrical machines.

.he object of my invention is to simplify the construction and arrangement of brush holder supports as used on railway motors; to render same readily accessible and readily removable without introducing tools into the interior of the motor casing; and at the same time produce an efficient structure which will do away with the undesirable wooden blocks formerly employed and will support the brush holder rigidly within the motor casing and permit a radial adjustment of same when found desirable.

The invention therefore consists of a brush holder, :1 metal supporting bracket for same, and means for fastening said bracket to the interior surface of a motor casing,

said fastening passing through said casing and readily accessible from the exterior of the motor.

More specifically considered, the invention consists of a brush holder support, provided with. a conical recess, a conical member within said recess, means accessible from the exterior of the-motor casing for fastening said. conical member to said casing, and means for insulating said support from said casing.

The invention further comprises improvements in the detail of construction of the holder and its support which will be hereinafter described and more clearly pointed out in the appended claims.

In the accompanying drawings illustrat, ing the preferred embodiment of my invention, Figure 1 is a sectional elevation of partofa railway motor equipped with my improved brushholder support; Fig. 2 is a section on the line 22 of Fig. 1, looking in the direction indicated by-the arrow; Fig. 3 is a longitudinal section through the support,

, the brush holder being shown in side elevation; and Fig. 4 is a detail view illustrating the means employed for obtaining a radial adjustment of the brush holder.

Referring now to the drawings, the casing and field-magnet frame of the railway motor is indicated at 5 and the armature and commutator are respectively shown in outline at 6 and 7. The cover which is ordinarily employed to permit ready access to the commutator and brush holders is indicated at 8. The holder for the carbon brushes 9 consists of the frame 10 provided with the box-shaped guide 11 in which said ,brushes are mounted and through which they slide freely. The brushes are maintained in contact with the commutator 7 by means of the pressure finger 12, pivoted to the frame 10 at 13 and having its outer end forced against the brushes 9 by the spring 14. The frame 10 is provided with a projection 10 by means of which ,it is adjust ably fastened to the supporting bracket 15 in a manner to be hereinafter described, The bracket is fastened to the interior surface of the motor casing so as to be readily accessible and so that it can .be placed in position and readily removed without the necessity of bringing-any tools whatever into play within said casing.

The bracket 15 is formed with a conical recess 16in which. is located the conical member 17 which is formed integral with or otherwise fastened to the bolt 17 passing completely through the motor casing 5 and fastened in position by the nut 18 outside said motor casing. The motor casing at the points where the brush-holder supports are to be placed is formed with recesses 5 preferably filled with Babbittmetal 19, so as to form a good seating surface for the brackets 15. The babbitt seat 19 is provided with the shoulder 19 which prevents a rotary movement of the bracket 15 on the bolt 1?. To thoroughly insulate the metal bracket 15 from the motor frame and bolt 17, I employ the conical sleeve 20 of insulating materialbetween the bracket and the conical member 17, and also the insulating strip 21 between the bracket 15 and the babbitted seat 19. A block 22 of insulating material is placed between the conical-member 17 and the fastening plug 23. It will be readily seen that by this arrangement the supporting bracket carrying the brush holder and the fastening bolt 17 can be re- 'ingsaid bolt rigidly to moved 1' adily and expeditiously from the motor casing by merely removing the nut 18 from bolt 17 on the exterior of said motor casin To provide for an adjustment of the brush holder radially relative to .the axis of'the armature, the projection 10 is slotted at 2stto recpive the stud 25 rigidly mounted in bracket 15. Said stud is provided With the Washer 26 and fastening nut 27. This tastoning means is so arranged tl by loosening up on said nut 27 witl'iout removing same from the stud 25, the brush holder may be removed "from the supporting bracket by merely sliding same along the cc of said bracket. This nut and stud also serve as the fastening means for the slotted terminal. plate 28 of the cable lead l urthermorc to prevent a lti llilly movement of the brush holder on the bracket 15 the t -ages .0 on projection 10 overhang the race 0 said bracket so as to form a groove into which said bracket projects.

A flexible shunt or pigtail 31 is provided for each brush in the holder. 'lhis shunt is fastened at one end to a spring clip 232 on the upper end of the brush, and the other end of said shunt is riveted to the extension 10 as clearly shown at 33, Fi

In the appended claims ll aim to cover all modifications of my invention which do not depart from its spirit: and scope.

Having thus described my inventiomwhat I claim as new and desire to secure by Letters Patent V l. in combination, a motor casing, a brush-holder, a metal supporting bracket for said holder, means comprising a single belt for fastening said bracket to the interior surface of said casing, said fastening means passing through the casino and readily accessible from the exterior thereof, and means for adj Listing said holder radially on said bracket.

2. In combination, a motor casing, a ln'ush-holder, metal supporting bracket for said holder, means 1 r fastening said bracket to the interior surface of said as ing, said fastening means comprising a single bolt passing tarough the casing and readily accessible from the zzlicziior thereof, and means inde iendent of s2 id casing for fastening the bolt rigidly to said bracl.

3.111 combination, a motor ca 1 k 'a blush-holder, a metal supporting bracket on which said holder adj ustably mounted, means for fastening; said bracket to the interior surface oi? said casing, said fastening means comprising a single bolt passing through the casing and readily accec ale from the exterior thereof, n, sans for tin-stem said bracket, and means for completely insulating said bolt from said b 'acltet.

4 In combination, a. motor casing, a brush holder, a metal supporting bracket for said holder, and means for fastening said bracket to the interior surface of said casing, said fastening means com rising a single bolt having an enlarged head located in said bracket said bolt passing through the casingand readily accessible from the exterior thereof, means for fastening said bolt rigidly to said bracket, and means for preventing a rotary movement of said bracket about said bolt.

In combination, a motor casing, a brush holder support provided With a recess hav ing an inclined side or Wall, means C0111- prising a member fitting said recess and passing thmugh said motor casingi or fastening said support to the interior of the casing, and means for rigidl fastening said member in said recess.

(3. in combination, a motor casing, a brush holder support provided with aconical re cess, and means comprising a member havher in said recess, and means accessible from the exterior of the motor casing for fastenlog said conical member to said casing.

8. In combination, a motor casing, a brusli-holde support provided with a conical recess, a conical member fitting said recess, means for fastening said conical member in said recess, means accessible from the exterior of the motor casing for fastening said conical member to said casing, and means for preventing a rotary movement of said support relative to the conical member and its fastening means.

9. in. combination, a motor casing, a brush-holder support provided with a conical recess, a conical. member fitting said recess, means for fastening said conical mem l in said recess, means accessible from the tGllOl the motor casing for fastening t .id conical member to said casing, and means for insulating" said support from said conical. member and said casing.

10, In combination, a brush holder having a hoioshaped brush guide provided on one side with an integral. extension carrying a pressure finger and on its opposite side with an integral projection formed With an open slot, a support for said holder a stud and nut on said support for fastening said holder to said support, said stud cooperating' with said slotted projection in such a manner hat the holder can be removed from said support Without removing the nut from said stud.

11. in combination, a motor casing,

brush-holder support provided With a fri1s- In testimony whereof I affix my signature,

tum-shaped recess, a member having a 001'- in the presence of two Witnesses respondingly frustum-shaped head whlch T fits into said recess, and two independent CLARLBCE CROCKER' 5 means for fastening said member to said Witnesses:

motor casing and to said support respec- LILLIAN J. BRITTON, tively. ELIZABETH C. BRITTON. 

